Silk-twisting mill and like machine



'Nov. 25, 1930. V I... c. JUNILLON ETAL 1,782,967

I SILK TWISTIN-G MILL AND LIKE MACHINE Filed April 25, 1929 HENRI Five/ms -6/u.o7'.

Patented a... 25,1'1930 UNITED STATES PATENT OFFICE" LOUIS GASIMIR JUNILLON, F VADENCE, AND HENRI FRANCOIS ,GILLOT, OI LYON,

.. l FRANCE SILK-TWISTING MILL AND LIKE MACHINE Application filed April 25, 1929, Serial No. 3 58,100, and in France Kay 7, 1828.

This invention relates to silk-twisting mills and similar machines comprising twisting spindles which rotate to twist a textile thread or yarn, and reels on which the twisted prodnot is wound.

In such machines, the twist is a function of the ratio between the angular speed of the spindle and the linear speed of the thread on its way to the collecting reel.

The known machines generally comprise an endless belt contacting with a'number of spindles to frictionally drive the same, and friction wheels driving the collecting reels, these wheels being keyed on a common shaft which is mechanically connected with the belt-driving gear. With such an arrangement the linear speed of the thread is substantially constant, but the angular speed of the spindles varies owing to the unavoidable slips. The wear also reduces the diameter of:

shows one element of a twisting mill according to the invention.

The spindle 1 supporting the bobbin 2 is driven by. an endless belt 3 in the well-known manner. The thread 4 is wound on a reel 5 which is driven by a friction wheel 6,. As

shown, wheel 6 acts on the cylinder formed by the thread already wound on reel 5, with the resultthat the linear speed of thread. 4 is equal to the peripheric'al speed of wheel 6.

Spindle 1 is provided witha worm 7 meshing with a worm-wheel 8 keyed with a pinion 9 which in turn meshes with a gear wheel 10, loose on its shaft 15. Wheel 10 is keyed with a pulley 11 which, through a belt or string 12, drives a pulley 13 keyed with friction wheel 6. An idler 14 is the beltorstring 12.

provided tension The shaft 15 of gear wheel -10 may be adusted in position in an elongated opening 16 provided in an arm 17 integral with the gear case 18 in which the worm gear is enclosed.

This arrangement permits to adjust the twist by changing wheel 10 or pinion 9. This adustment could also be performed by rovidmg1 fgepped pulleys in lieu of pullbys 11 an The thread guide 19 is preferably controlled in the usual way, all the thread guides of the mill being driven by the same mechanism. But it could also be controlled by a separate gear driven from wheel 6. I

It will be easily understood that-with the arrangement described, the twist is quite independent of the slip of belt 3 on spindle 1 and also of the diameter of the latter. Moreover, the twist of an element can be adjusted spindle comprising a friction wheel contacting on the cylinder formed by the yarn al ready wound onthe reel, a pulley fixedly carried by said friction wheel, a worm screw carried by said spindle, a worm wheel meshing with said worm screw, a pinion fixedto said worm wheel, a shaft, a gear wheel loose on said shaft meshing with said pinion, a pulley,fixedly carried by said ear wheel and 1a tensioned belt passing roun said two puleys. v

In testimony thereof weaflix our signatures.

LOUIS CASIMIR JUNILLON.

. HENRI FRANCOIS GILLOT. 

